Nick from the awesome MTJ recently posted an article about this plugin: QuickRebuild. It is totally and utterly great, and I'm not saying this because this plugin saved me several hours of tedious clicking today (well, actually I am).
Basically the plugin adds an extra 'rebuild' icon to your menu bar that gives you the option to rebuild all your blogs in one go (or just a subselection of them). You can download it here.
Oh, and the documentation is lying: it does work with MT5, which makes it even better.


Hi, Maarten
I'm Nick of Tokyo, Japan.
Thank you for introducing my blog's article and my friend's awesome plugin.
It's an really honor for me.
I'd like to thank you too, 'cause I get a lot of informations and tips from you and your website everyday. You have really marvelous techniques!
I'm happy we would exchange our information about Movable Type and make it hot more and more!
Point to note. The plugin builds only entries; it does not rebuild pages.